package com.itheima.consumer.controller;

import com.itheima.consumer.domain.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * 服务调用方
 */
@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("/goods/{id}")
    public Goods findGoodsById(@PathVariable("id") int id) {
        System.out.println("findGoodsById..." + id);

        //远程调用Goods服务中的findOne接口
        /**
         * 使用RestTemplate
         * 1. 定义Bean
         * 2. 注入Bean
         * 3. 调用方法
         */

        /**
         * 动态从Eureka Server中获取provider的ip和端口
         * 1. 注入DiscoveryClient对象,在启动类上添加@EnableDiscoveryClietn注解进行激活
         * 2. 调用方法
         */

        List<ServiceInstance> instances = discoveryClient.getInstances("EUREKA-PROVIDER");
        //判断集合是否有数据
        if (instances == null && instances.size() == 0) {
            return null;
        }
        ServiceInstance instance = instances.get(0);
        String host = instance.getHost();//获取ip
        int port = instance.getPort();//获取端口

        System.out.println(host);
        System.out.println(port);

        String url = "http://"+host+":"+port+"/goods/findOne/" + id;
        //调用方法
        Goods goods = restTemplate.getForObject(url, Goods.class);

        return goods;
    }
}